二苯碳酰二肼光度法测定低含量COD_(Cr)

Determination of Low Concentration COD_(Cr) by Photometry of Diphenylcarbazide

本文以二苯碳酰二脐光度法可测1～70mg／LCODCr，最低检出限为0，8mg/L，变异系数为6，2％，可用于污水处理厂出水、纯净水、饮用水、自来水等低含量CODCr。测定。

In this paper CODCr with concentration as low as 1 - 70 mg/L was test by photometry of Diphenylcarhazide with LOD and RSD as 0. 81 mg/L and 6. 2 % respectively. This technology is available to test CODCr with low concentration such as that in effluent of sewage treatment plants, pure water, drinking water and running water.